1991 C2500 Chevy 5.7 engine oil

[STS]

Would this oil be ok to run in my 1991 C2500 Chevy? 

[txab]

Yes. But you may find on an older high mileage engine, a "heavier weight" oil might be better as far as oil consumption. you might be better off with a 15w-40 or similar.

 

Can't really go wrong with any major oil today. They all perform well. It comes down more to consumption, if any, to decide viscosity.

 

My .02 cents

 

You'll get plenty of additional answers

Edited November 5 by txab

[Black02Silverado]

That would be fine.  How many miles on it? Depending on your location a 10w-30 would be good as well.